Light guide device and mouse

Abstract

A light guide device includes a main body defining a cavity, a lens received in the cavity, and a light guide block extending from the main body. The main body has a top surface and a peripheral side surface connecting the top surface. The light guide block extends from the peripheral side surface in a form of a curve along a direction from a position of the peripheral side surface adjacent to the top surface towards an end of the main body opposite to the top surface. The light guide block curves away from the peripheral side surface along the direction. The light guide block has an incident surface parallel to the top surface and a plurality of side surfaces connecting the incident surface and the peripheral side surface.

What is claimed is: 
     
         1 . A light guide device, comprising:
 a main body having a top surface and a peripheral side surface coupled to the top surface, the main body defining a cavity that extends through the main body and the top surface;   a lens received in the cavity; and   a light guide block extending from the peripheral side surface in a form of a curve along a direction from a position of the peripheral side surface adjacent to the top surface towards an end of the main body opposite to the top surface;   wherein the light guide block curves away from the peripheral side surface along the direction and has an incident surface parallel to the top surface and a plurality of side surfaces connecting the incident surface and the peripheral side surface.   
     
     
         2 . The light guide device as claimed in  claim 1 , wherein each of the plurality of side surfaces extends from the peripheral side surface and along a direction away from the peripheral side surface, the plurality of side surfaces comprises a first side surface, a second side surface, a third side surface, and a fourth side surface, the second side surface and the fourth side surface are two opposite curved surfaces, the first side surface and the third side surface are two opposite flat surfaces. 
     
     
         3 . The light guide device as claimed in  claim 2 , wherein the second side surface gradually broadens along its extending direction from the peripheral side surface to the incident surface; the fourth side surface gradually broadens along its extending direction from the peripheral side surface to the incident surface. 
     
     
         4 . The light guide device as claimed in  claim 1 , wherein the peripheral side surface and the plurality of side surfaces are total reflection surfaces. 
     
     
         5 . The light guide device as claimed in  claim 1 , wherein the main body has an inner surface around the cavity, area of the inner surface between the lens and the top surface is a total reflection surface. 
     
     
         6 . The light guide device as claimed in  claim 1 , wherein the peripheral side surface is a curved surface. 
     
     
         7 . The light guide device as claimed in  claim 1 , wherein the light guide device further comprises a base coupled to an end of the main body opposite to the top surface, the base defines a through hole aligned and air communicating with the cavity and a gap facing the incident surface. 
     
     
         8 . The light guide device as claimed in  claim 1 , wherein the light guide device further comprises an engaging portion coupled to the base opposite to the main body. 
     
     
         9 . The light guide device as claimed in  claim 1 , wherein the light guide device is made of transparent material. 
     
     
         10 . A mouse comprising:
 a shell defining an opening; and   a printed circuit board, a light source, an optical sensor, and a light guide device in the shell;   the light guide device, comprising:   a main body having a top surface and a peripheral side surface coupled to the top surface, the main body defining a cavity that extends through the main body and the top surface;   a lens received in the cavity; and   a light guide block extending from the peripheral side surface in a form of a curve along a direction from a position of the peripheral side surface adjacent to the top surface towards an end of the main body opposite to the top surface;   wherein the light guide block curves away from the peripheral side surface along the direction and has an incident surface parallel to the top surface and a plurality of side surfaces connecting the incident surface and the peripheral side surface.   
     
     
         11 . The mouse as claimed in  claim 10 , wherein the top surface of the main body is positioned in the opening; the light source is mounted on the printed circuit board and faces the incident surface. 
     
     
         12 . The mouse as claimed in  claim 10 , wherein each of the plurality of side surfaces extends from the peripheral side surface and along a direction away from the peripheral side surface, the plurality of side surfaces comprises first a side surface, a second side surface, a third side surface, and a fourth side surface, the second side surface and the fourth side surface are two opposite curved surfaces, and the second side surface has a larger size than the fourth side surface, the first side surface and the third side surface are two opposite flat surfaces. 
     
     
         13 . The mouse as claimed in  claim 12 , wherein the second side surface gradually broadens along its extending direction from the peripheral side surface to the incident surface; the fourth side surface gradually broadens along its extending direction from the peripheral side surface to the incident surface. 
     
     
         14 . The mouse as claimed in  claim 10 , wherein the light guide device further comprises a base coupled to an end of the main body opposite to the top surface, the base defines a through hole aligned and air communicating with the cavity and a gap facing the incident surface, the light source is positioned in the gap. 
     
     
         15 . The mouse as claimed in  claim 10 , wherein the light guide device further comprises an engaging portion coupled to the base opposite to the main body, the optical sensor is engaged in the engaging portion. 
     
     
         16 . The mouse as claimed in  claim 10 , wherein the light guide device is made of transparent material. 
     
     
         17 . The mouse as claimed in  claim 10 , wherein the peripheral side surface is a curved surface. 
     
     
         18 . The mouse as claimed in  claim 10 , wherein the peripheral side surface and the plurality of side surfaces are total reflection surfaces; the main body has an inner surface around the cavity, area of the inner surface between the lens and the top surface is a total reflection surface.